1DBR

HYPOXANTHINE GUANINE XANTHINE

Entity

Entity ID	Chain ID	Description	Type	Chain length	Formula weight	Number of molecules	DB Name (Accession)	Biological source	Descriptive keywords
1	A, B, C, D	HYPOXANTHINE GUANINE XANTHINE PHOSPHORIBOSYLTRANSFERASE	polymer	231	26522.4	4	UniProt (Q26997) Pfam (PF00156) In PDB	Toxoplasma gondii	HGXPRTASE
2	A, B, C, D	MAGNESIUM ION	non-polymer		24.3	4	Chemie (MG)
3		water	water		18.0	387	Chemie (HOH)

Contents of the asymmetric unit

Polymers	Number of chains	4
	Total formula weight	106089.4
Non-Polymers*	Number of molecules	4
	Total formula weight	97.2
All*	Total formula weight	106186.6

*Water molecules are not included.